Abstract
HAVING noticed both these works on the appearance of the last previous editions in 1874, we need say little here. The reasoning in i., we may remark, is always upon the curve itself, and is not derived by taking the limiting form of the inscribed polygon; and similarly in the case of surfaces. The work has grown from 160 pp. to 174 pp., and there is one more plate of figures.
(i.) Exposition Géométrique des Propriétes générales des Courbes.
Par Charles Ruchonnet (de Lausanne). Quatrième édition augmentée. (Paris, 1880.)
(ii.) Éléments de Calcul approximatif.
Par C. Ruchonnet (de Lausanne). Troisième édition revue. (Paris, 1880.)
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(i) Exposition Géométrique des Propriétes générales des Courbes (ii) Éléments de Calcul approximatif. Nature 23, 481 (1881). https://doi.org/10.1038/023481b0
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DOI: https://doi.org/10.1038/023481b0